Cotter-pin puller



M. H. HARTER.

COTTER PIN FULLER. APPLICATION FILED 0:0. 6, 1920.

Patented July 11, 1922.

corrEn-rnv FULLER.

Specification of Letters Patent.

Patented July 111', 1922.

Application filed December 6, 1920. Serial No. 428,462.

To all whom it may concern:

Be it known that I, MARION H. HARTER, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements in Cotter-Pin Pullers; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention relates to improvements in cotter pin pullers and has forits object to provide such a puller that is positive in its action andhas great lifting or extracting power.

To the above ends, generally stated, the invention consists of the noveldevices and combination of devices hereinafter described and defined inthe claims.

In the accompanying drawings which illustrate the invention, likecharacters inclioate like parts throughout the several views.

Referring to the drawings Fig. 1 is a side elevation of the improvedcotter pin puller, applied to a cotter pin inserted through a hole in abolt to hold a castellated nut thereon, some parts being shown indifferent position by means of broken lines;

Fig. 2 is a view corresponding to Fig. 1 with the exception that thepuller has been operated to lift the engaged cotter pin;

Fig. 3 is a fragmentary view partly in elevation and partly on sectiontaken on the line 38 of Fig. 2; and

Fig. 4 is a plan view of the invention as shown in Fig. 2.

The numeral 5 indicates a screw-threaded bolt or bar having mountedthereon, a castellated nut 6 held against rotation by a cotter pin 7inserted through diametrically opposite slots in said nut and a bore inthe bolt 5. r

The improved cotter pin puller comprise a pair of handles 8 and 9intermediately and pivotally connected at 10. These handles 8 and 9 areprovided, respectively, with jaws 11 and 12-having on their opposingfaces, shearing edges 13. Formed with the outer end of the jaw 11, is along supporting finger 14 offset toward the jaw 12 and having its innerface formed on a curve, the center of which, is at the axis of the pivot10. A sharp curved tooth 15 is formed on the outer end of the jaw 12 andarranged to move close to the inner face of the supporting finger 14during the pivotal movement of the handle 8.

To pull the cotter pin 7 from the bolt 5, the curved tooth 15 isinserted through the eye thereof, as shown in Fig. 1, with the cotterpin puller held in the hand 16, as indicated by broken lines. The handle9 is then drawn toward the handle 8 to carry the supporting finger 14into engagement with the nut 6 as a base of resistance, as indicated bybroken lines in Fig. 1. Then by drawing the handle 8 toward the handle9, the curved tooth 15 will be moved toward the jaw 11 and thereby drawthe cotter pin 7 from the bolt 5, as shown in Figs. 2 and 3. In liftingthe cotter pin 7, the supporting finger 14 engages said in, as bestshown in Fig. 2, and is thereby held against slipping on the nut 6.

If the cotter pin is too long to be entirely withdrawn by the tooth 15and cannot easily be withdrawn by means of the fingers, the same may begrasped by the shearing edges 13 and withdrawn by a step-bystepmovement, by resting the jaws 12 on the nut 6 or other support andlifting on the handles 8 and 9. Or, in case the cotter pin is broken atits eye by the tooth 15, the same may be withdrawn in the same manner.

The curved inner face of the supporting finger 14 is locatedsufficiently close to the tooth 15 to prevent an engaged cotter pin frombeing accidentally separated from said tooth, and the curved surface ofthe tooth also greatly assists in holding the cotter pin thereon. Bymeans of the improved cotter pin puller, cotter pins located inont-of-theway places and in various different positions, may be veryeasily pulled.

What I claim is 1. A cotter pin puller comprising a pair of jaw-equippedpivotally connected handles, one of the jaws having a supporting fingeroffset toward the other aw, said other jaw having a tooth adapted toenter the eye of a cotter pin and to move close to the inner face of thesupporting finger and in the plane thereof.

2. A cotter pin puller comprising a pair of jaw-equipped pivotallyconnected handles, one of the jaws having a supporting finger ofisettoward the other jaw, the inner face of the supporting finger being on acurve the center of which is substantially at the pivotal connection ofthe handles said other jaw having a tooth adapted to enter the eye ofaootter pin, said tooth being arranged to move close to the curved innerface of the supporting finger.

3. A cotter pin puller comprising a pair of jaw-equipped pivotallyconnected handles, one of the jaws having a support- 10 ing fingeroffset toward the other jaw, the

said other jawhaving a sharp curved tooth adapted to enter the eye of acotter pin, said tooth being arranged to move close to the curved innerface of the supporting finger.

In testimony whereof I aflix my signature.

MARION H. HARTER.

